Profile: There probably wasn't a better example of saves appearing out of nowhere than Guerra in 2011. The 26-year-old right-hander was called up from Double-A (skipped right over Triple-A) in mid-May, worked four appearances worth of middle relief, then was thrust into the ninth inning. Guerra responded by going 21-for-23 in save chances with just the second full season strikeout-to-walk ratio above 2.00 of his career. The only thing he does exceptionally well is limit homers (0.39 HR/9 in 2011, 0.49 in his Minor League career), but otherwise his strikeout (7.33 per nine in 2011, 8.81 in the minors) and walk (3.47 per nine in 2011, 5.23 in the minors) rates won't wow you. Guerra is a regression candidate (2.31 ERA and 1.18 WHIP) but also a candidate to lose the closer's job at some point, mostly because Kenley Jansen is just that damn good. Tread carefully. (Mike Axisa)

The Quick Opinion: Guerra is a risky proposition in 2012 because his Minor League track record suggests his big league performance was a bit of a fluke last year, and also because Kenley Jansen is standing over his shoulder waiting to steal some saves.

Profile: There may not have been a more predictable bet heading into 2012 than "Javy Guerra will lose his job to Kenley Jansen," and that's exactly what happened after barely a month of play. But it wasn't quite how we expected, because his peripherals barely changed at all, other than an increased walk rate, leaving him with a 3.34 FIP that was almost identical to his 3.30 mark in 2011. If he can stay healthy, that makes him a decent part of a bullpen, though with Jansen & Brandon League ahead of him for ninth-inning duties, the days of Guerra racking up saves seem very far away. (Mike Petriello)

The Quick Opinion: 2011's bullpen surprise became 2012's nightmare as Javy Guerra lost his closer's job, took a liner off the jaw, and missed time with knee & oblique injuries, leaving his future uncertain.

Profile: Don’t look now, but it’s a White Sox reliever who didn’t immediately vomit on his uniform when taking the mound. Guerra turned in a solid season, though there’s a chance he’ll see some regression in 2015. He isn’t an elite strikeout guy, and walks more batters than one would prefer, but got outs, which is more than most of the team’s bullpen can say. Despite his success, Guerra only recorded one save last season. With David Robertson in town, it’s safe to say that the jump-stepping Guerra isn’t going to improve on that number this season. (Chris Cwik)

The Quick Opinion: Guerra turned in a fine season, but doesn’t have a big role in the team’s bullpen. He could pick up some holds, but isn’t likely to see any save opportunities.

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